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Classic Motorcycle Numbers

Motorcycle Serial Numbers & VIN Numbers

Motorcycle Serial Number LocationsThese vary considerably from marque to marque

Engine NumbersCheck these locations:
Below the barrel stamped into the crankcase. On the front of the engine
stamped either side of the crankcase join. Below the clutch / transmission
area. Rear of cases below carburettor area.

Frame Numbers.By far the most common location is on the steering head. It may also
be found on one of the rear downtubes or on the front downtubes.Other locations include: top tube below fuel tank; lower frame rails; swing-arm pivot area.Motobecane Mobylette 1968: Forward of the rear wheel axle on left side.Matchless pre-1958: Directly below saddle on upper frame rail joint.Matchless 1958-59: rear of front downtube.Matchless 1960-67: right downtube below headstock.JamesRigid frames: usually stamped on the lug beneath the saddle on LHSPlunger frames: saddle lug (same as rigid), or on the steering head, LHSSwing arm frames: stamped into steering head and/or into a steel ID plate pop-rivetted onto the steering head.